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A Fall of Moondust is a hard science fiction novel by Arthur C. Clarke, first published in 1961. It was nominated for a Hugo Award for Best Novel, and was the first science fiction novel selected to become a Reader's Digest Condensed Book.
By the 21st century, the Moon has been colonized, and is open to tourists who can afford the trip. Some of them are trapped after a lunar quake. Can they be rescued?
Although still very much a research establishment, it is visited by tourists who can afford the trip. One of its attractions is a cruise across one of the lunar seas, named the Sea of Thirst, which has filled with an extremely fine dust, a fine powder far drier than the contents of a terrestrial desert and which almost flows like water, instead of the common regolith which covers most of the lunar surface. A specially designed "boat" named the Selene skims over the surface of the dust in the same manner as a jetski.
But on one cruise, a moonquake causes an underground cavern to collapse, upsetting the equilibrium. As the dustcruiser Selene passes over, it sinks about 15 meters below the surface of the dust, hiding the vessel from view, and trapping it beneath the dust. Immediately there are potentially fatal problems for the crew and passengers inside. The sunken Selene has a limited air supply, there is no way for heat generated to escape, communications are impossible, and no one else is sure where Selene has been lost. As precious time begins to run out and the Selene heats up and the air becomes unbreathable, young Captain Pat Harris and his chief stewardess Sue Wilkins try to keep the passengers occupied and psychologically stable while waiting to be rescued. They are helped by a retired space ship captain and explorer, Commodore Hansteen, who is initially traveling incognito.
Chief Engineer (Earthside) Robert Lawrence is skeptical that a rescue can be mounted, even if the Selene can be located. He is ready to abandon an initially unsuccessful search, when he is contacted by Thomas Lawson, a brilliant but eccentric astronomer who, from his vantage point on a satellite high above the Moon, Lagrange 2, believes he has detected the remains of a heat trail on the surface. An expedition is organized and Lawrence indeed makes contact with the Selene. However the completely alien environment results in numerous unforeseen complications. The rescue mission decides to sink a tube supplying oxygen to the Selene first, in an effort to buy time to think of a way to get the passengers out. However, this becomes a race against the clock, as the heat in the Selene knocks out the chemical air purification system and the passengers are suffering from CO2 poisoning. To preserve air, most passengers enter a chemically induced sleep, with only Pat Harris and physicist Duncan McKenzie staying awake. Just in time, the rescuers manage to drill a hole in the roof and sink the air supply.
A plan is hatched to save the passengers of the Selene by sinking several concrete caissons to the roof of the ship and cutting a hole. When the first caisson is sunk, disaster strikes again: the liquid wastage of the passengers had been expelled out of the ship, turning the dust around it into mud, which causes another, smaller, cave-in. The Selene sinks once more, this time only a small distance, but crucially, at a slope. This means the caissons cannot be connected anymore to the sloping roof. Also air supply and communications have been damaged. After restoring these latter two, a new plan is made to sink the caissons, but now the bottom one has a flexible tube attached to it which can be mounted to the sloping roof of the Selene. The rescue mission works according to plan: the caissons are sunk, the dust is scooped out and the connection is made, but now time is running out again. When the air supply holes were drilled, Selene's double hull was breached and the space in between slowly filled with dust. The metal-rich dust reached the battery packs and short-circuited them. This causes the inner hull to be burning slowly. The resulting breach is barricaded by the passengers, but dust is still pouring in and there is a fear that the burning material will cause the liquid oxygen supply to explode. Meanwhile, Robert Lawrence is working in the rescue shaft: he sets a small ring charge to make a hole in the roof. Just in time, the hole is made and the passengers escape through the shaft. Captain Harris is the last to leave, up to his waist in dust. Just when he is clear of the shaft, the liquid oxygen explodes, destroying the Selene.
A short epilogue sees Lawrence writing his memoirs, Pat and Sue married, and Pat hoping to transfer to the space service.[wikipedia]
Language: English
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